<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        * {
        padding: 0px;
        margin: 0px;
    }
       .header{
        width: 100vw;
        height: 50vw;
        background-color: #ddd;
       }
       .header{
        width: 100vw;
        height: 50vw;
        background-color: #ccc;
       }
       .header{
        width: 100vw;
        height: 50vw;
        background-color: #ddd;
       }
    </style>

</head>
<body>
    <div class="header">
        <div class="left"> </div>
            <div class="middle">微信</div>
            <div class="right">...</div>
        </div>
        <div class="main"></div>
        <div class="footer">
          <div>微信</div>
          <div>通讯录</div>
          <div>发现</div>
          <div>我</div>
        </div>
</body>
</html>